Bump Bazel to v2.0.0 (bazel-contrib#902)

Author: chenrui333

.travis.yml

@@ -51,19 +51,19 @@ jobs:
     - <<: *linux
       env: TEST_SCRIPT=test_rules_scala BAZEL_VERSION=0.28.1
     - <<: *linux
-      env: TEST_SCRIPT=test_rules_scala BAZEL_VERSION=1.2.1
+      env: TEST_SCRIPT=test_rules_scala BAZEL_VERSION=2.0.0
     - <<: *linux
       env: TEST_SCRIPT=test_reproducibility BAZEL_VERSION=0.28.1
     - <<: *linux
-      env: TEST_SCRIPT=test_reproducibility BAZEL_VERSION=1.2.1
+      env: TEST_SCRIPT=test_reproducibility BAZEL_VERSION=2.0.0
     - <<: *osx
       env: TEST_SCRIPT=test_rules_scala BAZEL_VERSION=0.28.1
     - <<: *osx
-      env: TEST_SCRIPT=test_rules_scala BAZEL_VERSION=1.2.1
+      env: TEST_SCRIPT=test_rules_scala BAZEL_VERSION=2.0.0
     - <<: *osx
       env: TEST_SCRIPT=test_reproducibility BAZEL_VERSION=0.28.1
     - <<: *osx
-      env: TEST_SCRIPT=test_reproducibility BAZEL_VERSION=1.2.1
+      env: TEST_SCRIPT=test_reproducibility BAZEL_VERSION=2.0.0
 
 before_install:
   - |

README.md

@@ -110,7 +110,7 @@ for an example workspace using another scala version.
 
 | bazel  | rules_scala gitsha |
 |--------|--------------------|
-| 1.2.1  | HEAD               |
+| 2.0.0  | HEAD               |
 | 0.28.1 | HEAD               |
 | 0.23.x | ca655e5a330cbf1d66ce1d9baa63522752ec6011 |                                     |
 | 0.22.x | f3113fb6e9e35cb8f441d2305542026d98afc0a2 |

tools/bazel

@@ -31,9 +31,9 @@ case "$bazel_version" in
         darwin_sha='5d50ae13ba01a224ddf54cfd818289bee5b38e551cca22bffc79b89f377d2095'
         linux_sha='a2a7e4cb38d7bc774a5bbfab4d45293f5f2158eb6caf0128792cc1148732a4e6'
         ;;
-    '1.2.1')
-        darwin_sha='59e469bf1d8d1615b67856ea17e761be05e9c92b462e55c0354cd78145b480d5'
-        linux_sha='ae6249e25b0f5a06d79fad90325477dd56275657951cf7aa6a3cbcd79fc4d749'
+    '2.0.0')
+        darwin_sha='c675fa27d99a3114d681db10eb03ded547c40f702b2048c99b8f4ea8e89b9356'
+        linux_sha='2fbdc9c0e3d376697caf0ee3673b7c9475214068c55a01b9744891e131f90b87'
         ;;
     *)
         echo "The requested Bazel version '$bazel_version' is not supported"